Fix further NSURLSession swizzling woes (#840)
Fix further NSURLSession swizzling woes (#840)

* Fix further NSURLSession swizzling woes

Following #710, a new issue was discovered when Earl Grey is linked together with New Relic. This PR fixes the bug by actually selecting the correct `delegate` object and querying correctly if that object responds to the original selector.

Closes #839

* Style

* More style woes

google/EarlGrey,google/EarlGrey,google/EarlGrey,google/EarlGrey,google/EarlGrey